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Planar‐Coordination PdSe 2 Nanosheets as Highly Active Electrocatalyst for Hydrogen Evolution Reaction
Author(s) -
Lin Zhiping,
Xiao BeiBei,
Wang Zongpeng,
Tao Weiying,
Shen Shijie,
Huang Liangai,
Zhang Jitang,
Meng Fanqi,
Zhang Qinghua,
Gu Lin,
Zhong Wenwu
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202102321
Subject(s) - electrocatalyst , overpotential , materials science , coordination geometry , coordination number , transition metal , crystallography , inorganic chemistry , catalysis , chemistry , electrochemistry , hydrogen bond , electrode , ion , molecule , organic chemistry , biochemistry
The coordination environment is crucial for the activity of an electrocatalyst, which defines the interaction between the central and adjacent atoms. In traditional 2D MX 2 (M = Mo, W, etc., X = S, Se), M is usually coordinated with 6 X atoms in either trigonal prismatic (2H) or octahedral (1T) polyhedrons. With such a coordination configuration, only the edge X sites exhibit activity for hydrogen evolution reaction (HER). Here, a planar‐coordination transition metal chalcogenide, PdSe 2 is reported, as an efficient electrocatalyst for the HER in an alkaline electrolyte. By reducing the spatial polyhedron coordination to planar polygon coordination, the M sites in PdSe 2 can be efficiently activated to interact with the adsorptive intermediates. As a result, both Pd and Se atoms act as active sites for hydrogen evolution with neutral adsorption ability. With an overpotential of 138 mV at 10 mA cm −2 , this work advances the exploration of planar‐coordination HER electrocatalysts.